ETC-ATD-GC/MS法测试墙纸中挥发性有机物

Determination of Volatile Organic Compounds in Wallpaper by Environmental Test Chamber-Auto Thermal Desorption-Gas Chromatography /Mass Spectrum Method

采用环境测试舱（ETC）、自动热脱附仪（ATD）和气相色谱/质谱（GC/MS）联用技术,研究并建立了墙纸中15种挥发性有机物（VOCs）的分析方法.对ATD实验条件、吸附剂选择等研究发现,与常规吸附剂Tenax TA相比,吸附剂Carbopack B/CarbosieveTM S-Ⅲ对VOC单体具有更好的吸附性能,更适合于有机物的吸附捕集.本方法对VOC单体的最小检出限（LODs）范围为0.01 ～0.4 μg/m3,方法的加标回收率为90％ ～109％,相对标准偏差（RSD）小于11％.用该法测试多种市售墙纸的VOCs,发现墙纸释放VOCs的种类与墙纸材料有较大关联.纸基墙纸的释放量较低,只释放少量的1-丁醇和丙二醇;无纺墙纸和PVC墙纸释放出较多的甲苯、苯乙烯、2-乙基-1-己醇、壬醛和萘等;而金属墙纸则释放出较多的直链或支链烷烃.

A variety of volatile organic compounds （VOCs） released from different wallpapers,were determined by virtue of 1 m3 environment test chamber,auto thermal desorption （ATD） and gas chromatography/mass spectrum （GC/MS）.The study on ATD experimental conditions and adsorbent selection was found that,Carbopack B/CarbosieveTM S-Ⅲ adsorbent exhibited a better trap performance than conventional Tenax TA,and more suitable for the adsorption of various organic monomer.In this method,the limit ranges of detection （LODs） for various VOCs was 0.01 ～0.4μ g/m3.The average recovery ranged from 90％ to 109％,and the relative standard deviation （RSD） was less than 11％.Test results of various commercially available wallpaper samples showed that the wallpaper material had a great effect on its released VOC composition.Paper base wallpapers emited little TVOC and released just 1-butyl alcohol and propylene glycol,whereas Non-woven wallpapers and PVC wallpapers released more toluene,styrene and 2-ethyl-l-hexanol,nonanal,naphthalene,etc.Much alkanes （straightchained and branched-chain） were found from metal wall papers.